Results 21 to 30 of about 7,550 (263)
Groupwise Geometric and Photometric Direct Image Registration [PDF]
Procedings of the British Machine Vision Conference 2006, 2006 Image registration consists in estimating geometric and photometric transformations that align two images as best as possible. The direct approach consists in minimizing the discrepancy in the intensity or color of the pixels. The inverse compositional algorithm has been recently proposed by Baker et al. for the direct estimation of groupwise geometric
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Exploiting Image Collections for Recovering Photometric Properties [PDF]
, 2011 We address the problem of jointly estimating the scene illumination, the radiometric camera calibration and the reflectance properties of an object using a set of images from a community photo collection. The highly ill-posed nature of this problem is circumvented by using appropriate representations of illumination, an empirical model for the ...
Díaz, Mauricio, Sturm, Peter
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Consistent joint photometric and geometric image registration [PDF]
2010 IEEE International Conference on Image Processing, 2010 In this paper, we derive a novel robust image alignment technique that performs joint geometric and photometric registration in the total least square sense. The main idea is to use the total least square metrics instead of the ordinary least square metrics, which is commonly used in the literature.
Hiêp Quang Luong +3 more
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Sensors, 2015 An important class of complementary metal-oxide-semiconductor (CMOS) image sensors are those where pixel responses are monotonic nonlinear functions of light stimuli. This class includes various logarithmic architectures, which are easily capable of wide
Jing Li +2 more
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Generalized Content-Preserving Warp: Direct Photometric Alignment Beyond Color Consistency
IEEE Access, 2018 Motion estimation is vital in many computer vision applications. Most existing methods require high quality and large quantity of feature correspondence and may fail for images with few textures.
Kai Chen, Jingmin Tu, Jian Yao, Jie Li
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Medieval Coins of Three Different Types and of Various States of Preservation
Journal of Open Archaeology DataWe have developed a device for digitizing coins using photometric stereo, which serves two purposes. For inventory it allows identifying a coin, which has been digitized before, and avoids mixing up similar coins.
Thomas Dunker +3 more
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Unsupervised Learning of Depth and Camera Pose with Feature Map Warping
Sensors, 2021 Estimating the depth of image and egomotion of agent are important for autonomous and robot in understanding the surrounding environment and avoiding collision.
Ente Guo +3 more
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Photometric imaging of VW Cephei
The Astrophysical Journal, 1992 We have tested the process of using the maximum entropy method (MEM) and VRI photometry to reconstruct arbitrary spot distributions on a W UMa system similar to VW Cephei. The tests used a series of 86 test models each of which consisted of one circular spot located at some position on the surface of a modeled W UMa system.
Paul D. Hendry +2 more
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Photometric image-based rendering for image generation in arbitrary illumination [PDF]
Proceedings Eighth IEEE International Conference on Computer Vision. ICCV 2001, 2002 A Photometric Image-Based Rendering (PIER) concept is proposed that facilitates the generation of an image with an arbitrary illumination. Based on this concept, we aim to generate both diffuse and specular reflections. It is not necessary to explicitly recover 3D shape and reflection properties of the scene.
Yasuhiro Mukaigawa +3 more
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Photometric image-based rendering for virtual lighting image synthesis [PDF]
Proceedings 2nd IEEE and ACM International Workshop on Augmented Reality (IWAR'99), 2003 A concept named Photometric Image-Based Rendering (PIBR) is introduced for a seamless augmented reality. The PIBR is defined as image-based rendering which covers appearance changes caused by the lighting condition changes, while Geometric Image-Based Rendering (GIBR) is defined as image-based rendering which covers appearance changes caused by the ...
Mukaigawa, Yasuhiro +2 more
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